Three years into her marriage with a younger husband, Chisato Shoda found their once-peaceful life gradually growing distant, leaving her feeling increasingly lonely. One day, at the hospital where she works, she meets Sagawa, a patient receiving treatment, and her life takes a sudden turn. Exhausted by the growing disconnect with her husband, Chisato chooses to open her heart to Sagawa. His warmth and tenderness fill the emotional void within her, and her feelings for him deepen rapidly. Despite her inner turmoil over her marriage, her bond with Sagawa grows stronger each day, drawing her to him both physically and emotionally.